The scraping of fruit trees is an important measure for orchard management in winter. It not only helps to increase tree vigor, prevents premature aging of trees, but also eliminates pathogens and pests that overwinter in bark cracks, reduces the overwintering base number, and controls or reduces some of the coming year. The occurrence and damage of pests and diseases led to the prevention and control of “no pesticides and pesticidesâ€. The winter shave of fruit trees can be carried out after defoliating from fruit trees to before sprouting in late spring. The main reason is to scrape off the rough skin and skins on the trunk and main branches. The following points should be noted when scraping the skin.
First, change early for the night. Most people think that the sooner the scraping is done from leaf to flowering, the better. It is actually wrong, because it takes several months before the leaves fall to flowering. The early scraping of the skin is due to the exposure of young tissue, wind and sun, and loss of moisture. On the other hand, after scraping off the old skin, it is equivalent to people taking off a layer of clothes, and the ability to resist coldness is obviously reduced. Therefore, it is better to scrape the skin before the pests emerge before they sprout.
Second, the change is shallow. People need skins on their faces. A considerable number of fruit growers are too deep and heavy to shave, so that fresh and disease-free protection organizations are severely damaged and affect the normal growth of the trees. Therefore, it is appropriate to have just enough to scrape the body and knock off the skin. The trees are white and the trees are green and the disease-free body is not scratched.
Third, change the rough to fine. Do not scratch only the main stem, the main branch into a piece of presbycuse, for more than one year should also carefully observe the small branch, not missed a small tumor, because the size of the mung bean tumor can produce hundreds of millions of colonies, the whole tree after scraping We must carefully check it up and down again to achieve the purpose of completely scraping.
Fourth, change to bring buried. When scraping the skin, pay attention to the plastic cloth or chemical fertilizer bag under the tree to collect the epidermis. Be careful not to throw it on the edge of the orchard or burn it. Because the bacteria thrown in the garden can continue to spread along with the flow of water, burning up waste of nutrients, it is better to dig more than 30 cm deep in the orchard and bury the fallen leaves together with the tree. After rotting it is Better nutrition.
Fifth, change old to new. After scraping the skin, it is not recommended to apply or spray Fumei arsenic, which has been effective, high residue, and high pathogenicity, in the past. It can use Corbico, which is a 5 times solution of pollution-free biological pesticides, or a non-pollution chemically synthesized gum tree, biofilm. Such as brushing, spraying, especially gum tree, bio-film coating on the tree to form a film, the bacteria is not easy to invade and spread, the tree moisture is not easy to lose.
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